XML 36 R32.htm IDEA: XBRL DOCUMENT
v3.19.3

Securities - Other Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Other investments | $ 12,913 | $ 11,499
Federal Reserve Bank Stock [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Other investments | 7,917 | 7,010
Federal Home Loan Bank Stock [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Other investments | 4,646 | 4,139
First National Bankers Bank Stock [Member] |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Other investments | $ 350 | $ 350

X
- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117539-209714 + Details
Name: | us-gaap_EquitySecuritiesWithoutReadilyDeterminableFairValueAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=smbk_FederalReserveBankStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InvestmentInFederalHomeLoanBankStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=smbk_FirstNationalBankersBankStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |